Home / 21,036.79-31,535.65-7,897.87

Finding the Fourth Proportional to 21,036.79, 31,535.65 and 7,897.87

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Solution

The fourth proportional to 21,036.79, 31,535.65 and 7,897.87 is: 11,839.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.79 : 31,535.65 = 7,897.87 : x
  2. Step 2: Convert to fraction form
    21,036.79/31,535.65 = 7,897.87/x
  3. Step 3: Cross multiply
    21,036.79x = 31,535.65 × 7,897.87
  4. Step 4: Simplify right side
    21,036.79x = 249,064,464.07
  5. Step 5: Solve for x
    x = 249,064,464.07/21,036.79
  6. Step 6: Final answer
    x = 11,839.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.